Here's a final video developer diary for Cities: Skylines, paving the way for next week's release of Colossal Order's city builder. Here's word on the themes explored in the new diary:

Never before seen in a city builder, Cities: Skylines contains the first integrated Dynamic Water System giving all the rivers and estuaries within the game real-world mass and direction. This will mean that you must think carefully where to place your water services to ensure that your city’s waste will go downstream and that you don’t pollute your population’s water supply!

The video developer diary also explores Zoning within the game, built to enable you to reasonably simulate a realistic city of up to one million people, along with the District Tool and the Economic Simulation model.